Minneapolis-based Hibachi Buffet Inc. owes more than $117,000 in unpaid wages to 18 workers, according to details from a federal investigation released Monday.

The company paid kitchen workers a fixed salary that did not cover the federal minimum wage of $7.25 an hour, according to the U.S. Department of Labor investigation.

The labor department also said the company failed to pay workers overtime and keep accurate records of hours worked by kitchen employees.

Hibachi Buffet Inc. settled with the labor department, agreeing to install -- and use -- a digital time clock and use a public accounting firm to perform audits of the company's employment and pay practices.